Burner Setting - Kärcher HDS Middle series Service Manual

HDS Middle Range / HDS Premium Range

3.3 Burner setting

Fuel pump, fuel pressure adjustment
6
7
Air flap, air volume adjustment
1 Pressure line to the burner
2 Fuel pump
3 Adjusting screw, fuel pressure
4 Suction hose, fuel
5 Return hose to the fuel tank
6 Air flap, air volume adjustment
7 Locking screw, air flap
Service Manual 04.2008
1
2
4
3
5
Basic Settings and Service Procedures
Note:
Precise basic setting of the burner is only
possible if the heating coil has been
thoroughly cleaned of soot and the inner
deposits have been removed beforehand.
Measuring the water temperature
– Install shut-off valve with thermometer (special
tool) in the unit outlet.
– Switch on burner and bring unit with shut-off
valve to operating pressure at full water volume.
– Let unit run in burner operation for approx. 5
minutes until the maximum water temperature
is reached.
– Determine increase in water temperature
(water outlet temperature minus water inlet
temperature).
– For nominal value, see „Technical
Specifications"
– Measure smoke number, CO
exhaust temperature (special measuring
equipment tool).
Adjusting the fuel pressure
– Adjust fuel pressure (and water temperature)
using adjusting screw (3) (see arrow).
– For nominal value, see „Technical
Specifications"
Adjusting the smoke number
– If the smoke number is too high the air flap (6)
must be opened further or the fuel pressure
must be reduced.
Adjust CO value
2
– Adjust CO value by adjusting the air flap (see
2
arrow). Open air flap, CO
Note:
After completing the basic setting, seal the
fuel pump and air flap.
level and
2
level reduces.
2
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